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Kley RA, Leber Y, Schrank B, Zhuge H, Orfanos Z, Kostan J, Onipe A, Sellung D, Güttsches AK, Eggers B, Jacobsen F, Kress W, Marcus K, Djinovic-Carugo K, van der Ven PFM, Fürst DO, Vorgerd M. FLNC-Associated Myofibrillar Myopathy: New Clinical, Functional, and Proteomic Data. NEUROLOGY-GENETICS 2021; 7:e590. [PMID: 34235269 PMCID: PMC8237399 DOI: 10.1212/nxg.0000000000000590] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 12/28/2020] [Indexed: 11/15/2022]
Abstract
Objective To determine whether a new indel mutation in the dimerization domain of filamin C (FLNc) causes a hereditary myopathy with protein aggregation in muscle fibers, we clinically and molecularly studied a German family with autosomal dominant myofibrillar myopathy (MFM). Methods We performed mutational analysis in 3 generations, muscle histopathology, and proteomic studies of IM protein aggregates. Functional consequences of the FLNC mutation were investigated with interaction and transfection studies and biophysics molecular analysis. Results Eight patients revealed clinical features of slowly progressive proximal weakness associated with a heterozygous c.8025_8030delCAAGACinsA (p.K2676Pfs*3) mutation in FLNC. Two patients exhibited a mild cardiomyopathy. MRI of skeletal muscle revealed lipomatous changes typical for MFM with FLNC mutations. Muscle biopsies showed characteristic MFM findings with protein aggregation and lesion formation. The proteomic profile of aggregates was specific for MFM-filaminopathy and indicated activation of the ubiquitin-proteasome system (UPS) and autophagic pathways. Functional studies revealed that mutant FLNc is misfolded, unstable, and incapable of forming homodimers and heterodimers with wild-type FLNc. Conclusions This new MFM-filaminopathy family confirms that expression of mutant FLNC leads to an adult-onset muscle phenotype with intracellular protein accumulation. Mutant FLNc protein is biochemically compromised and leads to dysregulation of protein quality control mechanisms. Proteomic analysis of MFM protein aggregates is a potent method to identify disease-relevant proteins, differentiate MFM subtypes, evaluate the relevance of gene variants, and identify novel MFM candidate genes.
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Affiliation(s)
- Rudolf Andre Kley
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Yvonne Leber
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Bertold Schrank
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Heidi Zhuge
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Zacharias Orfanos
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Julius Kostan
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Adekunle Onipe
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Dominik Sellung
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Anne Katrin Güttsches
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Britta Eggers
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Frank Jacobsen
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Wolfram Kress
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Katrin Marcus
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Kristina Djinovic-Carugo
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Peter F M van der Ven
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Dieter O Fürst
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | - Matthias Vorgerd
- Department of Neurology (R.A.K., H.Z., D.S., A.K.G., F.J., M.V.), Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany; Department of Neurology and Clinical Neurophysiology (R.A.K.), St. Marien-Hospital Borken, Borken, Germany; Department of Molecular Cell Biology (Y.L., Z.O., P.F.M.V., D.O.F.), Institute for Cell Biology, University of Bonn, Bonn, Germany; Department of Neurology (B.S.), DKD HELIOS Klinik Wiesbaden, Wiesbaden, Germany; Department of Structural and Computational Biology (J.K., A.O., K.D.-C.), Max Perutz Laboratories, University of Vienna, Vienna, Austria; Medizinisches Proteom-Center (B.E., K.M.), Ruhr-University Bochum, Bochum, Germany; Institute of Human Genetics (W.K.), University of Würzburg, Würzburg, Germany; and Department of Biochemistry (K.D.-C.), Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
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